Sliver roll forming machine



J. S. BROWN Filed Sept. 19, 1946 sLvER ROLL FORMING MACHINE PatentedJan. 24, 1950 SLIVER ROLL FORMING MACHINE James Scott Brown, Arbroath,Scotland, assigner to Douglas Fraser & Sons Limited, Arbroath, Scotland,a corporation of Great Britain Application September 19, 1946, SerialNo. 697,942 In Great Britain December 22, 1944 Section 1, Public Law690, August 8, 1946 Patent expires December 22, 1964 1 claim. l

This invention relates to sliver roll forming machines, and moreparticularly, though not exclusively, to machines for winding into rollssliver of jute or other bast libres.

In U. S. Patent No. 1,791,076, of which this application is animprovement, there is described a machine incorporating two half arborsunitary with large end discs carried by pivotal arms and adapted to beswung apart on completion of the roll winding operation to permitejection of the finished roll. The machine also includes a roller ordrum accommodated between the discs for driving the sliver roll byfriction.

According to the invention I provide small diameter arbor-startingdiscs, that is, of a diameter which is only a fraction of the diameterof the finished sliver roll, and I secure to the arms guide cheek-plateswhich extend towards the back of the machine and which are formed withconcave cutaways so as to extend partly around the discs, theconcavities approximately fitting the rims of the discs. Thesecheek-plates are spaced apart a distance slightly exceeding the width ofthe roll and serve to keep the expanding roll in position and ensure thebuilding up of the roll to the correct width.

On starting a sliver winding operation the discs are driven frictionallyby rotary drivers for speeding up the half-arbor in starting theformation of a roll. As the discs are of small diameter, in contrast tothat of the roll produced or to the discs of said patent, the spacerequired between one machine and that next adjacent for manipulation oflarge rolls is greatly reduced.

With the use of the arbor-starting discs it is possible to reduce thediameter of the friction roll-driver drum.

The cheek plates cover the nip of the roll on the respective drum.

The cheek plates thus function as sliver conductors, the surfaces liableto contact with the ends of the roll having at most a limited frictionalaction on the roll.

The rearward extensions of the cheek plates are particularly useful inthat together with a hanging vertical spring back flap of knownconstruction, which serves to push the sliver forward towards thehalf-arbors for a restart, the cheek plates lform as it were a boxcontainer which serves to guide the sliver that continues to be fedduring the few seconds in which the arms are descending for a restart.

The gure of the accompanying drawing is a part end elevation partvertical section of a sliver roll forming machine according to theinvention. The view shown in the drawing is taken approximately in aplane extending between the half-arbors of the machine and shows thepertinent parts of the machine to which the present invention relates,when the arms, discs and cheek plates are in their elevated position atapproximately the timewhen a roll or sliver is completed but has notbeen removed.

Referring to the drawing, there is provided on each half-arbor as 6 asmall diameter arborstarting disc l, that is, of a diameter which isonly a fraction of the diameter of the nished sliver roll 2, and Isecure to the arms as 3 guide cheek plates as 4 which extend from aboutthe position of the arbor as shown towards the back of the machine andwhich are formed with concave cutaways so as to extend partly around therespective discs I, the concavities approximately tting the rims of thediscs I. These cheekplates 4 are spaced apart a distance slightlyexceeding the width of the sliver roll 2 and serve to keep the expandingsliver roll in position and ensure the building up of the sliver roll tothe correct width.

On starting a sliver winding operation the ends of the arms 3 carryingthe half-arbor 6 are in their lower position so that the discs l aredriven frictionally by rotary drivers as 5 for speeding up thehalf-arbors 6 in starting the formation of a sliver roll on thehalf-arbors. As the discs I are of small diameter, the space requiredbetween one machine and that next adjacent for manipulation of largesliver rolls is greatly reduced. The sliver winding operation is carriedout in approximately the same manner as that disclosed in the U. S.patent referred to above, and the mechanism for swinging the arms 3apart on completion of a rollforming operation may be the same asdisclosed in said patent, such features, however, form no part of thepresent invention.

The relative diameters of the half-arbors 6, of the discs l and of thefinished sliver roll will be .Y clear from the showing in the drawing.

With the use of the arbor-starting discs l it is possible to reduce thediameter of the friction driver drum 1 co-operative with the halfarbors6 and engageable with the sliver roll after formation of the roll hasstarted. The several drums 'l for a group of machines may be carrie on acommon shaft 9.

It is to be understood that the distance between the two paralleldrivers 5 slightly exceeds the axial length of the drum 1, and that thedistance between the two cheek plates 4 slightly exceeds the axiallength of the boss of the drum 1, so that when the arms 3 are loweredthe discs l contact with the drivers 5, and the cheek plates 4 just.clear theshaft 9 of the drum 1.

The cheek plates t4 cover the nip Vof the sliver roll on its driver drum1.

The cheek plates 4 thus function as sliver conductors, the surfacesliable to contact with the ends of the sliver roll having at most alimited frictional action on the roll.

The rearward extensions of the cheek plates 4 are particularly useful inthat together with a hanging vertical back fiap -8 `of' knownconstruction, which serves to push the sliver forwards rate from saidrotary drivers and non-coaxial therewith arranged to engage with thesliver roll on said half-arbors after formation of said roll hasstarted, said arbor-starting roll-conning discs being of substantiallysmaller diameter than that of the sliver roll when fully formed, and acheek plate secured to each arm partially embracing the periphery of thedisc carried thereby and extending toward the back of the machine, thecheek plates being of sufficient Width to cover the nip of the sliverroll with the driverdrum until the sliver roll is fully formed, and saiddiscs being of a diameter substantially less than the distance betweenthe upper and the lower boundary edges of the cheek plates.

JAMES SCOTT BROWN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS 'Number Name Date 1,791,076 Fraser let al Feb. 3,1931 1,960,146 Fraser et a1 May 22, 1934 1,985,822 Fraser et al Dec. 25,1934 2,004,045 Fraser et a1 June 4, 1935

